Free Homeostasis MCQs with Answers
698 Homeostasis MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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Read the Homeostasis notesFree MDCAT chapter notes with key terms698 questions · page 35 of 35
- A. Excess of water
- B. Deficiency of minerals.
- C. Deficiency of Minerals
- D. Dehydration
Explanation: Sometimes whole sentence is just for distracting the student, but you have to figure out which is important point.
Correct answer: Dehydration- A. Proximal convoluted tubule cof Nephron
- B. Distal convoluted tubule of Nephron
- C. Glomerulus
- D. Bowman\s capsule
Explanation: Glucose is a polar molecule that dissolves in water and blood plasma. It easily passes through the glomerular basement membrane.
Correct answer: Proximal convoluted tubule cof Nephron- A. Remove kidney stones without surgery
- B. Remove kidney stones with surgery
- C. Treat kidney with medicines
- D. Remove appendix
Explanation: Lithotripsy involves the treatment of stones in the kidneys or ureters by using high-energy shock waves, breaking the stones which can…
Correct answer: Remove kidney stones without surgery- A. Proximal convoluted tubule of nephron
- B. Distal convoluted tubule of nephron
- C. Glomerulus
- D. Bowman capsule
Explanation: The correct option is A. Glucose reabsorption primarily occurs in the proximal convoluted tubule (PCT) of the nephron in the kidney.
Correct answer: Proximal convoluted tubule of nephron685. A machine that works like a kidney for the removal of nitrogenous wastes from the blood is called
- A. Lithotipser
- B. Heamometer
- C. Dialyzer
- D. None of the above
Explanation: A dialyzer is a machine that functions similarly to a kidney in removing nitrogenous waste from the blood.
Correct answer: Dialyzer- A. Nephritis
- B. Nephrosis
- C. Ptosis
- D. Anuria
Explanation: Anuria is a condition characterized by the absence or significantly reduced production of urine by the kidneys.
Correct answer: Anuria- A. Heart
- B. Liver
- C. Stomach
- D. Kidneys
Explanation: Vasopressin, also known as antidiuretic hormone (ADH), plays a crucial role in maintaining the body's water balance.
Correct answer: Kidneys- A. Polyuria
- B. Glycusuria
- C. Polyphagia
- D. Polydipsia
Explanation: Polydipsia is a medical name for the feeling of extreme thirstiness. Polydipsia is an early symptom of diabetes mellitus and diabetes…
Correct answer: Polydipsia- A. 140 grams
- B. 160 grams
- C. 130 grams
- D. 150 grams
Explanation: The average weight of each human kidney is about 160 grams. This value can vary slightly based on factors such as age, gender, and overall…
Correct answer: 160 grams- A. 70-80%
- B. 80-90%
- C. 60-70%
- D. 60-80%
Explanation: Approximately 80%-90% of all nephrons in the human kidney are cortical nephrons.
Correct answer: 80-90%- A. Ureter
- B. Urethra
- C. Urinary bladde
- D. Pelvis
Explanation: The rare site of infection in the urinary tract is the ureter. The ureter is the tube that carries urine from the kidneys to the bladder.
Correct answer: Ureter- A. Proximal convulated tubule
- B. Glomerulus
- C. Loop of Henle
- D. Bowman's capsule
Explanation: Option C, the "Loop of Henle," is responsible for concentrating urine in the kidney due to its unique anatomical and functional…
Correct answer: Loop of Henle693. Normally the process which exerts the greatest control over the water balance of an individual is:
- A. Sweating
- B. Kidney function
- C. Evaporation through the skin
- D. Respiratory loss
Explanation: Option b is correct. Kidneys play a central role in regulating water balance through processes like filtration, reabsorption, and…
Correct answer: Kidney function- A. Distal tubule
- B. Urethra
- C. Urinary bladder
- D. Ureter
Explanation: The urethra is the final pathway for urine to leave the body. It is a tube that connects the urinary bladder to an external opening…
Correct answer: Urethra- A. Medulla
- B. Medulla oblongata
- C. Body fluid
- D. Hypothalamus
Explanation: The hypothalamus in the brain is the master switch that works as a thermostat to regulate the body's core temperature.
Correct answer: Hypothalamus- A. Salamander
- B. Great white shark
- C. Polar bear
- D. Butterfly
Explanation: Polar bears are classified as endothermic animals because they can regulate their body temperature internally, independent of external…
Correct answer: Polar bear- A. Receptor, Regulators, Effectors
- B. Receptors, Integrator, Effectors
- C. Sensors, Brain, Effectors
- D. All of the above
Explanation: The correct answer is Receptors, Integrator, Effectors. These are the three core components of a homeostatic mechanism:Receptor: Detects…
Correct answer: Receptors, Integrator, Effectors- A. -9oC
- B. 10oC
- C. -10oC
- D. 8.0oC
Explanation: Arctic snow fleas are tiny organisms that have adapted to survive in freezing temperatures as low as -10°C.
Correct answer: -10oC